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林木的早期预测和选择是林木育种研究中的重要课题.对14个毛白杨选种和杂种无性系苗期生长与其光合性能的比较研究结果表明,无性系问生长量和净光合速率等几个光合性能指标均达到差异极显著水平,杂种无性系的多数指标优于选种无性系.通过无性系材积生长与几个光合性能指标进行相关分析,发现除气孔阻力以外,其他指标与材积生长相关程度均达到极显著水平.相关系数较高的是材积分别与净光合速率乘以单株叶面积、LT值乘以单株叶面积和QE值,分别为0.887 5、0.870 7和-O.989 4.因此,这些指标与毛白杨的材积生长相关紧密,可以作为早期预测的参考指标.
Early prediction and selection of forest trees is an important issue in tree breeding research.Comparison of the growth and photosynthetic characteristics of 14 Populus tomentosa hybrids and hybrid clones showed that clonal growth and net photosynthetic rate Photosynthetic performance index reached a significant level of difference, most clonal hybrid clones better than the selected clones.By clonal volume growth and clonal correlation analysis of several photosynthetic properties, and found that in addition to stomatal resistance, and other indicators of volume growth The correlation coefficient is higher than the volume of photosynthesis and net photosynthetic rate multiplied by the leaf area per plant, LT value multiplied by leaf area per plant and QE values were 0.887 5,0.870 7 and -0.989 4. Therefore, these indicators are closely related to the volume growth of Populus tomentosa and can be used as a reference index for early prediction.